For UCSB Physics:
 

• Upon system BOOT: prompt, type linux single

• If asked for password, use PCS lilo passwd.

• System will boot into single user mode with a root prompt.

• Edit /etc/sysconfig/network file and it should contain:

NETWORKING=yes
FORWARD_IPV4=false
HOSTNAME=_your_machinename_here_.physics.ucsb.edu
GATEWAY=

If other values are present, please comment them out with a #

• Edit /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
BOOTPROTO=dhcp
ONBOOT=yes

Again, comment out any other variables.
 

• Check /etc/hosts and remove any stale host information.

Note, when using dhcp, you DO NOT need to define your own hostname and ip in /etc/hosts.